/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.shardingsphere.transaction.base.seata.at;

import io.seata.core.context.RootContext;
import org.apache.shardingsphere.infra.database.metadata.DataSourceMetaData;
import org.apache.shardingsphere.infra.executor.kernel.model.ExecutorDataMap;
import org.apache.shardingsphere.infra.executor.sql.hook.SQLExecutionHook;

import java.util.List;
import java.util.Map;

/**
 * Seata transactional SQL execution hook.
 *
 * @author 米泽鹏
 */
public final class TransactionalSQLExecutionHook implements SQLExecutionHook {

	private static final String SEATA_TX_XID = "SEATA_TX_XID";

	private boolean seataBranch;

	@Override
	public void start(final String dataSourceName, final String sql, final List<Object> parameters,
	                  final DataSourceMetaData dataSourceMetaData, final boolean isTrunkThread, final Map<String, Object> shardingExecuteDataMap) {
		if (isTrunkThread) {
			if (RootContext.inGlobalTransaction()) {
				ExecutorDataMap.getValue().put(SEATA_TX_XID, RootContext.getXID());
			}
		} else if (!RootContext.inGlobalTransaction() && shardingExecuteDataMap.containsKey(SEATA_TX_XID)) {
			RootContext.bind((String) shardingExecuteDataMap.get(SEATA_TX_XID));
			seataBranch = true;
		}
	}

	@Override
	public void finishSuccess() {
		if (seataBranch) {
			RootContext.unbind();
		}
	}

	@Override
	public void finishFailure(final Exception cause) {
		if (seataBranch) {
			RootContext.unbind();
		}
	}
}
